[Asterisk-Users] Recommended Network Latency

[Mike Benoit]

Define happily? 

Jitter is obviously important, but latency is too. For day-to-day
business calls, 250ms is a little high. Both parties will definitely
notice it. In my experience you will find yourself talking over one
another quite often. Even with 100ms this continues to happen from time
to time.

There is no doubt that it can be done, but if your latency ever exceeds
300ms, people tend to get frustrated and it could really start to cause
problems.

Once your agents realize there is a 250ms latency, and get used to it,
it might not be so bad. But personally, it wouldn't be acceptable to me.



On Fri, 2005-05-27 at 16:25 +0100, Tony Hoyle wrote:
> Waldo Rubinstein wrote:
> > 
> > I'm planning on setting up some remote agents and before doing so, I  
> > did some simple PING tests to measure latency. The average latency I  
> > got was 250ms. Does anyone have experience in terms of quality of  calls 
> > when there is such high latency? Can anyone comment?
> > 
> Latency isn't the issue - you could happily carry on a call over a 
> 2000ms latency.. satellite links can introduce this easily.
> 
> Your problem is jitter (ping stability).  Some software will calculate 
> this for you - eg. mtr gives the standard deviation for its ping history 
> (mine hovers around the 0.4 mark over 12 hops which is really stable AFAIK).
> 
> You can reduce jitter using good QoS, but it's better to have it as low 
> as possible to start with.
> 
> Tony
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-- 
Mike Benoit <ipso at snappymail.ca>
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